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Project16 2nd November 2015 08:56 AM

1 Attachment(s)

Originally Posted by thimios (
Nice work!
Can you share the pcb and schematic for psu?
Can you share the pcb for buffer?

Hop! :)

thimios 2nd November 2015 09:46 AM


Originally Posted by Project16 (
Hop! :)

Many many thanks!

jls001 6th November 2015 07:28 PM

@Keantoken: I have a doubt about Vbe(Q4) and Veb(Q3). One left channel I measured Veb(Q4) = 0.6649, Veb(Q3) = 0.6017. So after calculating it becomes 60.0632. Similarly right channel is 60.0673. Is this the calculated value for R1 (=R2)?

keantoken 6th November 2015 08:31 PM

Yes, that is correct. Notice that is just a 7% difference from the original value of 56.

jls001 7th November 2015 02:54 AM


I did the usual checks and adjustments (0.012 - 0.014 mV DC offset). This time there is absolutely no hum or hiss. I'll need some burn in as I'm experimenting with a thicker solid core internal wiring (20 gauge, Teflon insulation).

ammel68 9th November 2015 04:35 PM


Originally Posted by Project16 (
Hop! :)

Project, can you share the Sprint-Layout file for this power supply?

What style or brand of transformer fits on the board?


Project16 9th November 2015 05:39 PM

1 Attachment(s)
Hello ammel68!

I used this transformer.

For the sprint layout file is importing gerber because originally the layout has been designed with DesignSpark.

ammel68 9th November 2015 08:30 PM

Hello Project16,

Thank you for the zip file!

I'll have to search around and see if I can find a suitable transformer from Mouser or some other seller over here.

thimios 21st November 2015 11:14 AM

1 Attachment(s)
Another software based test.

keantoken 21st November 2015 11:55 AM

Can you list the exact parts you used? Is this before trimming?

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